The login screen stalls the team. Accounts pile up. Password resets eat time. Every app demands its own credentials. Single Sign-On (SSO) promises one login, one set of credentials, and instant access across systems. Yet the path to SSO is littered with pain points that kill velocity.
The first pain point: integration complexity. Each app has its own authentication flow, token type, and protocol. SAML, OAuth2, OpenID Connect—each needs custom wiring. This increases code overhead and slows delivery.
Second: identity provider lock-in. Many SSO systems force tight coupling with one IdP. When business or compliance needs change, migration costs rise. Uncoupling identity from application logic takes forethought and clean abstraction layers.
Third: session management. With SSO, a single session spans multiple apps. Poor expiry handling leads to security gaps or abrupt logouts for critical tools mid-task. Engineers must design clear, consistent policies for token refresh, timeout, and revocation.